Marcos Antonio Serrano Rodríguez is a former professional cyclist from Galicia, Spain. Turning professional in 1994, he joined the Kelme–Xacobeo team and then in 1999 the lottery-sponsored ONCE–Deutsche Bank. He remained part of the same team when in 2004 sponsorship and name passed to Liberty Seguros-Würth and in 2006, as the Astana-Würth Team.

Kelme was a professional cycling team based in Spain.